US6117354A - Piezoelectric ceramic composition - Google Patents
Piezoelectric ceramic composition Download PDFInfo
- Publication number
- US6117354A US6117354A US09/312,247 US31224799A US6117354A US 6117354 A US6117354 A US 6117354A US 31224799 A US31224799 A US 31224799A US 6117354 A US6117354 A US 6117354A
- Authority
- US
- United States
- Prior art keywords
- piezoelectric ceramic
- sup
- ceramic composition
- manganese
- mnco
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 39
- 239000000203 mixture Substances 0.000 title claims abstract description 18
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 239000011572 manganese Substances 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims abstract description 7
- 239000011656 manganese carbonate Substances 0.000 claims abstract description 7
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 235000006748 manganese carbonate Nutrition 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 150000001622 bismuth compounds Chemical class 0.000 description 4
- 229910000464 lead oxide Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910016264 Bi2 O3 Inorganic materials 0.000 description 1
- 229910019639 Nb2 O5 Inorganic materials 0.000 description 1
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000011363 dried mixture Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011369 resultant mixture Substances 0.000 description 1
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Inorganic materials [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/453—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/495—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/853—Ceramic compositions
Definitions
- the present invention relates to a piezoelectric ceramic composition, and more particularly to a piezoelectric ceramic composition useful as a material for producing piezoelectric ceramic elements such as piezoelectric ceramic filters and piezoelectric ceramic oscillators.
- Piezoelectric ceramic compositions predominantly comprising lead titanate zirconate (Pb(Ti x Zr 1-x , O 3 ) or lead titanate (PbTiO 3 ) have been widely used for the production of piezoelectric ceramic elements such as piezoelectric ceramic filters and piezoelectric ceramic oscillators.
- Piezoelectric ceramic compositions predominantly comprising lead titanate zirconate or lead titanate are generally produced by use of lead oxides, which cause a reduction in homogeneity of products due to evaporation of lead oxides.
- piezoelectric ceramic compositions predominantly comprising a layered bismuth compound represented by (Sr 1-x M x )Bi 2 Nb 2 O 9 contain no lead oxide and therefore do not introduce this type of problem.
- piezoelectric ceramic compositions predominantly comprising a layered bismuth compound have a small electromechanical coupling coefficient kt and therefore have not yet been widely used in practice.
- the present inventors conducted earnest studies to improve electromechanical coupling coefficient kt of a piezoelectric ceramic composition predominantly comprising a layered bismuth compound to thereby provide a piezoelectric ceramic composition which, when used as a material for the production of piezoelectric ceramic elements, exhibits a practical, acceptable electromechanical coupling coefficient kt value (more than 10%).
- the effect of the present invention is particularly excellent when M in the formula is at least one element selected from Ca and Ba.
- Ca and Ba may both be contained as M.
- piezoelectric ceramic samples were prepared according to the following method.
- the particle-size-regulated powder was molded at 1000 kg/cm 2 into a disk having a diameter of 12.5 mm and a thickness of 1 mm, and the disk was fired in air to thereby form a ceramic disk.
- the disk was subjected to a polarization treatment by the application of a DC voltage of 5-20 kV/mm for 10-30 minutes in a 150° C.-200° C. insulating oil to thereby obtain a piezoelectric ceramic serving as a sample.
- the sample was subjected to measurement of density, resistivity, and electromechanical coupling coefficient kt. The results are shown in Table 1.
- each of sample Nos. 2, 3, 4, 7, 8, 11, 12, 16 and 19, which fall within the scope of the present invention has an improved electromechanical coupling coefficient kt as compared with sample Nos. 1, 5, 6, 9, 10, 13, 14, 15, 17, 18, 20 and 21, which fall outside the scope of the present invention.
- electromechanical coupling coefficient kt of the piezoelectric ceramic composition which predominantly comprises a layered bismuth compound can be improved, and a piezoelectric ceramic composition useful as a material for piezoelectric ceramic elements such as piezoelectric ceramic filters and piezoelectric ceramic oscillators can be advantageously produced.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
A piezoelectric ceramic composition which contains a ceramic compound and manganese. The ceramic compound serves as a primary component and is represented by formula (Sr1-xMx)Bi2Nb2O9. In the formula, M represents a divalent metal element and x satisfies 0</=x</=0.3. Manganese is contained in an amount of 1.0 wt. % or less (0 being excluded) as MnCO3.
Description
1. Field of the Invention
The present invention relates to a piezoelectric ceramic composition, and more particularly to a piezoelectric ceramic composition useful as a material for producing piezoelectric ceramic elements such as piezoelectric ceramic filters and piezoelectric ceramic oscillators.
2. Background Art
Piezoelectric ceramic compositions predominantly comprising lead titanate zirconate (Pb(Tix Zr1-x, O3) or lead titanate (PbTiO3) have been widely used for the production of piezoelectric ceramic elements such as piezoelectric ceramic filters and piezoelectric ceramic oscillators. Piezoelectric ceramic compositions predominantly comprising lead titanate zirconate or lead titanate are generally produced by use of lead oxides, which cause a reduction in homogeneity of products due to evaporation of lead oxides. In contrast, piezoelectric ceramic compositions predominantly comprising a layered bismuth compound represented by (Sr1-x Mx)Bi2 Nb2 O9 contain no lead oxide and therefore do not introduce this type of problem.
However, piezoelectric ceramic compositions predominantly comprising a layered bismuth compound have a small electromechanical coupling coefficient kt and therefore have not yet been widely used in practice.
In view of the foregoing, the present inventors conducted earnest studies to improve electromechanical coupling coefficient kt of a piezoelectric ceramic composition predominantly comprising a layered bismuth compound to thereby provide a piezoelectric ceramic composition which, when used as a material for the production of piezoelectric ceramic elements, exhibits a practical, acceptable electromechanical coupling coefficient kt value (more than 10%).
The piezoelectric ceramic composition according to the present invention comprises a ceramic compound and manganese, wherein the ceramic compound serves as a primary component and is represented by formula (Sr1-x Mx)Bi2 Nb2 O9 wherein M represents a divalent metal element and x satisfies 0≦x≦0.3, and the manganese is contained in an amount of 1.0 wt. % or less (0 being excluded) calculated as MnCO3. The aforementioned parameter x is limited to 0-0.3 because if x falls outside the range, the effect of the present invention is not appreciable and an electromechanical coupling coefficient kt which enables the piezoelectric ceramic composition to serve in practice cannot be obtained. The amount of manganese is limited to 1.0% by weight or less (0 being excluded) as MnCO3 because when the manganese content falls outside the specified range, polarizable ceramics cannot be obtained.
Moreover, the effect of the present invention is particularly excellent when M in the formula is at least one element selected from Ca and Ba. Ca and Ba may both be contained as M.
The above and other objects, features, and advantages of the present invention will be more clearly understood from the below-described description of preferred embodiments of the invention.
The present invention will next be described in more detail.
A variety of piezoelectric ceramic samples were prepared according to the following method.
Starting raw materials, SrO, Bi2 O3, Nb2 O5, CaO, BaO and MnCO3 were provided and were weighed so as to form a compound of the formula (Sr1-x Mx)Bi2 Nb2 O9 wherein M represents a divalent metal element and x satisfies 0≦x≦0.3, followed by wet-mixing for about four hours by use of a ball mill. The resultant mixture was dried and then calcined at 700-900° C. Subsequently, the dried mixture was roughly crushed, wet-milled with an appropriate amount of an organic binder for four hours by use of a ball mill and passed through a 40-mesh sieve to thereby regulate the particle size of the milled powder. Subsequently, the particle-size-regulated powder was molded at 1000 kg/cm2 into a disk having a diameter of 12.5 mm and a thickness of 1 mm, and the disk was fired in air to thereby form a ceramic disk. After silver electrodes were formed on the surfaces (both main surfaces) of the ceramic disk by applying and burning a silver paste through a customary method, the disk was subjected to a polarization treatment by the application of a DC voltage of 5-20 kV/mm for 10-30 minutes in a 150° C.-200° C. insulating oil to thereby obtain a piezoelectric ceramic serving as a sample. The sample was subjected to measurement of density, resistivity, and electromechanical coupling coefficient kt. The results are shown in Table 1.
TABLE 1
______________________________________
Sample MnCo.sub.3
Density
Resistivity
kt
No. M x (wt %)
(g/cm.sup.3)
(Ω · cm)
(%)
______________________________________
*1 -- 0 0 6.75 2.0 × 10.sup.11
8.5
2 -- 0 0.1 7.05 4.0 × 10.sup.13
20.5
3 -- 0 0.5 6.96 6.0 × 10.sup.12
17.6
4 -- 0 1.0 6.80 4.0 × 10.sup.12
16.8
*5 -- 0 1.1 6.67 2.0 × 10.sup.10
Not polarizable
*6 Ca 0.1 0 6.80 2.0 × 10.sup.11
8.8
7 Ca 0.1 0.1 7.08 5.0 × 10.sup.13
22.9
8 Ca 0.1 1.0 6.70 4.0 × 10.sup.12
19.7
*9 Ca 0.1 1.1 6.65 2.0 × 10.sup.10
Not polarizable
*10 Ca 0.3 0 6.65 2.0 × 10.sup.11
8.5
11 Ca 0.3 0.1 6.98 4.0 × 10.sup.13
17.9
12 Ca 0.3 1.0 6.67 2.0 × 10.sup.12
17.6
*13 Ca 0.3 1.1 6.44 1.0 × 10.sup.10
Not polarizable
*14 Ca 0.4 0.1 6.26 7.0 × 10.sup.9
9.6
*15 Ba 0.1 0 6.85 2.0 × 10.sup.11
8.7
16 Ba 0.1 0.1 7.07 3.0 × 10.sup.13
21.9
*17 Ba 0.1 1.1 6.65 1.0 × 10.sup.10
Not polarizable
*18 Ba 0.3 0 6.67 9.0 × 10.sup.10
8.4
19 Ba 0.3 0.1 7.00 1.0 × 10.sup.13
20.9
*20 Ba 0.3 1.1 6.47 2.0 × 10.sup.10
Not polarizable
*21 Ba 0.4 0.1 6.31 8.0 × 10.sup.9
9.1
______________________________________
Samples marked with * fall outside the scope of invention.
As is apparent from Table 1, each of sample Nos. 2, 3, 4, 7, 8, 11, 12, 16 and 19, which fall within the scope of the present invention, has an improved electromechanical coupling coefficient kt as compared with sample Nos. 1, 5, 6, 9, 10, 13, 14, 15, 17, 18, 20 and 21, which fall outside the scope of the present invention.
According to the present invention, electromechanical coupling coefficient kt of the piezoelectric ceramic composition which predominantly comprises a layered bismuth compound can be improved, and a piezoelectric ceramic composition useful as a material for piezoelectric ceramic elements such as piezoelectric ceramic filters and piezoelectric ceramic oscillators can be advantageously produced.
Claims (4)
1. A piezoelectric ceramic composition comprising a ceramic compound and manganese, wherein the ceramic compound is the primary component and is represented by the formula (Sr1-x Mx)Bi2 Nb2 O9 wherein M represents at least one divalent metal element and 0≦x≦0.3, and the manganese is in an amount of 1.0 wt. % or less (0 being excluded) calculated as MnCO3.
2. A piezoelectric ceramic composition according to claim 1, wherein M is at least one of Ca and Ba.
3. A piezoelectric ceramic composition according to claim 1, wherein M is Ca and the manganese amount is 0.1 to 1.0 wt. % calculated as MnCO3.
4. A piezoelectric ceramic composition according to claim 1, wherein M is Ba and the manganese amount is 0.1 to 1.0 wt. % calculated as MnCO3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15664898A JP3399364B2 (en) | 1998-05-20 | 1998-05-20 | Piezoelectric ceramic composition |
| JP10-156648 | 1998-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US6117354A true US6117354A (en) | 2000-09-12 |
Family
ID=15632261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/312,247 Expired - Lifetime US6117354A (en) | 1998-05-20 | 1999-05-14 | Piezoelectric ceramic composition |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6117354A (en) |
| JP (1) | JP3399364B2 (en) |
| KR (1) | KR100296933B1 (en) |
| CN (1) | CN1104396C (en) |
| DE (1) | DE19922955C2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2353524A (en) * | 1999-08-26 | 2001-02-28 | Murata Manufacturing Co | Piezoelectric ceramic composition and device |
| US6258291B1 (en) * | 1999-02-08 | 2001-07-10 | Murata Manufacturing Co., Ltd | Piezoelectric ceramic composition and piezoelectric ceramic device using the same |
| US6383411B1 (en) * | 1999-08-26 | 2002-05-07 | Murata Manufacturing Co., Ltd. | Piezoelectric ceramic composition and piezoelectric ceramic device using the same |
| US6685850B2 (en) * | 2000-07-28 | 2004-02-03 | Tdk Corporation | Piezoelectric ceramic material |
| US6764609B2 (en) | 2001-10-11 | 2004-07-20 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric ceramic composition and piezoelectric element using the same |
| US20080169445A1 (en) * | 2005-09-30 | 2008-07-17 | Murata Manufacturing Co., Ltd. | Piezoelectric ceramic composition and piezoelectric component |
| US20110133608A1 (en) * | 2008-03-18 | 2011-06-09 | Kyocera Corporation | Piezoelectric ceramic and piezoelectric element using the same |
| US20110241483A1 (en) * | 2010-03-31 | 2011-10-06 | Tdk Corporation | Piezoelectric composition, piezoelectric ceramic, transducer, and ultrasonic motor |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109692963B (en) * | 2018-12-18 | 2022-06-10 | 宁波中杭磁材有限公司 | Preparation method of neodymium iron boron magnet with corrosion-resistant coating attached to surface |
| CN109604618B (en) * | 2018-12-18 | 2022-06-10 | 宁波中杭磁材有限公司 | Preparation method of neodymium iron boron magnet with wear-resistant coating attached to surface |
| CN119285356B (en) * | 2024-12-16 | 2025-02-14 | 湖南省美程陶瓷科技有限公司 | Piezoelectric ceramic material with high Curie temperature and high piezoelectric coefficient and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4877398A (en) * | 1972-01-24 | 1973-10-17 | ||
| JPS4878500A (en) * | 1972-01-26 | 1973-10-22 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4223186A1 (en) * | 1992-07-15 | 1994-01-20 | Hoechst Ceram Tec Ag | Sinterable offset at low temperatures for the production of piezoelectric, ceramic shaped bodies and shaped bodies produced therefrom by sintering |
| EP0581481B1 (en) * | 1992-07-31 | 1997-04-23 | Toyota Jidosha Kabushiki Kaisha | Bismuth layer compound |
| US5762816A (en) * | 1995-11-14 | 1998-06-09 | Murata Manufacturing Co., Ltd. | Piezoelectric ceramic composition |
-
1998
- 1998-05-20 JP JP15664898A patent/JP3399364B2/en not_active Expired - Fee Related
-
1999
- 1999-05-14 US US09/312,247 patent/US6117354A/en not_active Expired - Lifetime
- 1999-05-18 CN CN99106774A patent/CN1104396C/en not_active Expired - Fee Related
- 1999-05-18 KR KR1019990017788A patent/KR100296933B1/en not_active Expired - Fee Related
- 1999-05-19 DE DE19922955A patent/DE19922955C2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4877398A (en) * | 1972-01-24 | 1973-10-17 | ||
| JPS4878500A (en) * | 1972-01-26 | 1973-10-22 |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6258291B1 (en) * | 1999-02-08 | 2001-07-10 | Murata Manufacturing Co., Ltd | Piezoelectric ceramic composition and piezoelectric ceramic device using the same |
| GB2353524A (en) * | 1999-08-26 | 2001-02-28 | Murata Manufacturing Co | Piezoelectric ceramic composition and device |
| GB2353524B (en) * | 1999-08-26 | 2001-08-08 | Murata Manufacturing Co | Piezoelectric ceramic composition and piezoelectric ceramic device using the same |
| US6383411B1 (en) * | 1999-08-26 | 2002-05-07 | Murata Manufacturing Co., Ltd. | Piezoelectric ceramic composition and piezoelectric ceramic device using the same |
| US6423244B1 (en) | 1999-08-26 | 2002-07-23 | Murata Manufacturing Co. Ltd. | Piezoelectric ceramic composition and piezoelectric ceramic device using the same |
| US6685850B2 (en) * | 2000-07-28 | 2004-02-03 | Tdk Corporation | Piezoelectric ceramic material |
| US6764609B2 (en) | 2001-10-11 | 2004-07-20 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric ceramic composition and piezoelectric element using the same |
| US20080169445A1 (en) * | 2005-09-30 | 2008-07-17 | Murata Manufacturing Co., Ltd. | Piezoelectric ceramic composition and piezoelectric component |
| US7510669B2 (en) * | 2005-09-30 | 2009-03-31 | Murata Manufacturing Co., Ltd. | Piezoelectric ceramic composition and piezoelectric component |
| US20110133608A1 (en) * | 2008-03-18 | 2011-06-09 | Kyocera Corporation | Piezoelectric ceramic and piezoelectric element using the same |
| US8643255B2 (en) * | 2008-03-18 | 2014-02-04 | Kyocera Corporation | Piezoelectric ceramic and piezoelectric element using the same |
| US20110241483A1 (en) * | 2010-03-31 | 2011-10-06 | Tdk Corporation | Piezoelectric composition, piezoelectric ceramic, transducer, and ultrasonic motor |
| US8564180B2 (en) * | 2010-03-31 | 2013-10-22 | Tdk Corporation | Piezoelectric composition, piezoelectric ceramic, transducer, and ultrasonic motor |
Also Published As
| Publication number | Publication date |
|---|---|
| KR19990088364A (en) | 1999-12-27 |
| DE19922955A1 (en) | 1999-11-25 |
| JP3399364B2 (en) | 2003-04-21 |
| KR100296933B1 (en) | 2001-10-18 |
| CN1238316A (en) | 1999-12-15 |
| DE19922955C2 (en) | 2002-12-05 |
| CN1104396C (en) | 2003-04-02 |
| JPH11322426A (en) | 1999-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3259677B2 (en) | Piezoelectric ceramic composition | |
| JP3244027B2 (en) | Piezoelectric ceramic composition | |
| JP3259678B2 (en) | Piezoelectric ceramic composition | |
| US6093339A (en) | Piezoelectric ceramic composition | |
| JP3228175B2 (en) | Piezoelectric ceramic composition | |
| US6083415A (en) | Piezoelectric ceramic composition | |
| US6117354A (en) | Piezoelectric ceramic composition | |
| JP3362473B2 (en) | Piezoelectric ceramic composition | |
| US6080327A (en) | Piezoelectric ceramic composition | |
| US4511483A (en) | Piezoelectric ceramic compositions | |
| JPS647032B2 (en) | ||
| US2960411A (en) | Dielectric ceramic compositions | |
| JPH0566896B2 (en) | ||
| EP0012583A1 (en) | Piezoelectric ceramic production | |
| US6383411B1 (en) | Piezoelectric ceramic composition and piezoelectric ceramic device using the same | |
| JPH03164470A (en) | Piezoelectric ceramics and their manufacturing method | |
| DE2200787A1 (en) | Piezoelectric ceramic compositions | |
| DE1950317A1 (en) | Piezoelectric ceramic masses | |
| JPS6358777B2 (en) | ||
| JP3482954B2 (en) | Piezoelectric ceramic composition | |
| JPH02303173A (en) | Piezoelectric porcelain composition | |
| JPH0196973A (en) | Manufacture of piezoelectric porcelain | |
| DE2001290A1 (en) | Modified lead titanate/zirconate solid soln piezoelectric c | |
| JPH0629140B2 (en) | Piezoelectric element material and manufacturing method thereof | |
| US3472778A (en) | Piezoelectric ceramic |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: MURATA MANUFACTURING CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIMURA, MASAHIKO;ANDO, AKIRA;MINAMIKAWA, TADAHIRO;REEL/FRAME:010106/0629;SIGNING DATES FROM 19990625 TO 19990626 |
|
| STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
| FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
| FPAY | Fee payment |
Year of fee payment: 4 |
|
| FPAY | Fee payment |
Year of fee payment: 8 |
|
| FPAY | Fee payment |
Year of fee payment: 12 |